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Add comments describing isc_mem_putanddetach().

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This commit is contained in:
Mark Andrews
2000-09-05 22:20:36 +00:00
parent c4ec2c3190
commit 6c6bed90cb
1 changed files with 26 additions and 1 deletions
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27
lib/isc/include/isc/mem.h
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@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: mem.h,v 1.43 2000/09/05 03:30:19 marka Exp $ */
/* $Id: mem.h,v 1.44 2000/09/05 22:20:36 marka Exp $ */
#ifndef ISC_MEM_H
#define ISC_MEM_H 1
@@ -96,6 +96,31 @@ extern unsigned int isc_mem_debugging;
#define isc_mem_strdup(c, p) isc__mem_strdup((c), (p) _ISC_MEM_FILELINE)
#define isc_mempool_get(c) isc__mempool_get((c) _ISC_MEM_FILELINE)
/*
* isc_mem_putanddetach() is a convienence function for use where you
* have a structure with an attached memory context.
*
* Given:
*
* struct {
* ...
* isc_mem_t *mctx;
* ...
* } *ptr;
*
* isc_mem_t *mctx;
*
* isc_mem_putanddetach(&ptr->mctx, ptr, sizeof(*ptr));
*
* is the equivalent of:
*
* mctx = NULL;
* isc_mem_attach(ptr->mctx, &mctx);
* isc_mem_detach(&ptr->mctx);
* isc_mem_put(mctx, ptr, sizeof(*ptr));
* isc_mem_detach(&mctx);
*/
#ifdef ISC_MEM_DEBUG
#define isc_mem_put(c, p, s) \
do { \